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YAG fluorescent powder used in semiconductor illumination and preparation method thereof

A phosphor and semiconductor technology, applied in the field of semiconductor lighting, can solve the problems affecting the optical performance of white light LED devices, irregular particle shape, cumbersome preparation process, etc., and achieve the effect of regular shape, simple equipment and uniform size distribution

Inactive Publication Date: 2014-09-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial production, YAG yellow phosphor is mainly prepared by high-temperature solid-phase sintering process. The preparation process is generally cumbersome and the sintering temperature is high (≥1600 o C), huge energy consumption, high production costs and other issues
At the same time, due to the limitation of preparation technology, the existing commercial YAG yellow phosphor still has problems such as irregular particle shape and large size change, which seriously affects the optical performance of white LED devices.

Method used

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  • YAG fluorescent powder used in semiconductor illumination and preparation method thereof
  • YAG fluorescent powder used in semiconductor illumination and preparation method thereof
  • YAG fluorescent powder used in semiconductor illumination and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 1) Crystalline aluminum chloride by mass ratio: yttrium chloride hexahydrate: cerium chloride hexahydrate: ethanol: deionized water: formamide: 1,2-propylene oxide = 1:0.46:0.07:1.34:1.24:0.35 : 1.79, weigh crystalline aluminum chloride, yttrium chloride hexahydrate, cerium chloride hexahydrate, ethanol, deionized water, formamide and 1,2-propylene oxide;

[0019] 2) Fully dissolve the crystalline aluminum chloride, yttrium chloride hexahydrate, and cerium chloride hexahydrate in step 1) in a mixed solution of deionized water, ethanol, and formamide under the condition of a constant temperature water bath at 25°C, and then Add 1-2 propylene oxide, stir and mix thoroughly, put it into a sealed container, and keep warm at a constant temperature of 60°C until the mixed solution forms a gel;

[0020] 3) Dry the gel at a constant temperature of 60°C for 24 hours, then grind and disperse it, keep it at 500°C for 4 hours, and then in H 2 and N 2 In a gas atmosphere mixed at ...

Embodiment 2

[0023] 1) Crystalline aluminum chloride by mass ratio: yttrium chloride hexahydrate: cerium chloride hexahydrate: ethanol: deionized water: formamide: 1,2-propylene oxide = 1:0.46:0.14:1.34:1.24:0.35 : 1.79, weigh crystalline aluminum chloride, yttrium chloride hexahydrate, cerium chloride hexahydrate, ethanol, deionized water, formamide and 1,2-propylene oxide;

[0024] 2) Under the condition of a constant temperature water bath at 15°C, fully dissolve the crystalline aluminum chloride, yttrium chloride hexahydrate and cerium chloride hexahydrate in step 1) in a mixed solution of deionized water, ethanol and formamide, and then Add 1-2 propylene oxide, stir and mix thoroughly, put it into a sealed container, and keep warm at a constant temperature of 60°C until the mixed solution forms a gel;

[0025] 3) Dry the gel at a constant temperature of 70°C for 24 hours, then grind and disperse it, keep it at 600°C for 4 hours, and then heat it under H 2 and N 2 In a gas atmosphere...

Embodiment 3

[0027] 1) Crystalline aluminum chloride by mass ratio: yttrium chloride hexahydrate: cerium chloride hexahydrate: ethanol: deionized water: formamide: 1,2-propylene oxide = 1:0.46:0.07:0.85:1.85:0.35 : 1.79, weigh crystalline aluminum chloride, yttrium chloride hexahydrate, cerium chloride hexahydrate, ethanol, deionized water, formamide and 1,2-propylene oxide;

[0028] 2) Under the condition of a constant temperature water bath at 20°C, fully dissolve the crystalline aluminum chloride, yttrium chloride hexahydrate and cerium chloride hexahydrate in step 1) in a mixed solution of deionized water, ethanol and formamide, and then Add 1-2 propylene oxide, stir and mix thoroughly, put it into a sealed container, and keep warm at a constant temperature of 50°C until the mixed solution forms a gel;

[0029] 3) Dry the gel at a constant temperature of 80°C for 6 hours, then grind and disperse it, keep it at 600°C for 4 hours, and then place it under H 2 and N 2 In a gas atmosphere...

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Abstract

A YAG fluorescent powder used in semiconductor illumination disclosed by the invention is a powder formed by Y3Al5O12:Ce<3+> microspheres with diameter of 1-2 mum. The preparation method adopts inorganic salt as a precursor and a sol gel method to obtain theY3Al5O12:Ce<3+> fluorescent microspheres at lower heat treatment temperature. The invention has the advantages of simple preparation process, convenient operation, short preparation time and low heat treatment temperature, can greatly reduce energy consumption, and is suitable for industrial mass production. YAG fluorescent microspheres obtained by the invention have the characteristics of regular shape, uniformly distributed size and excellent luminescence properties and can be widely used for the production of white LED lighting device.

Description

technical field [0001] The invention relates to YAG fluorescent powder used in semiconductor lighting and a preparation method thereof, belonging to the technical field of semiconductor lighting. Background technique [0002] In recent years, due to the rapid improvement of the performance of blue light, purple light and ultraviolet light-emitting diodes (LEDs), the LED lighting industry has developed rapidly. Compared with existing lighting devices, LED lighting has many advantages such as energy saving, environmental protection, low cost, high efficiency, short response time, long service life, impact resistance and vibration resistance, so it has become an ideal choice for a new generation of lighting devices. [0003] As an environmentally friendly new generation of lighting sources, LED mainly refers to white light LEDs. At present, more mature white LED devices mainly use blue LED chips to excite YAG yellow phosphor to achieve white light. In industrial production, Y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCY02B20/181Y02B20/00
Inventor 樊先平吴立昂乔旭升吴一民万军
Owner ZHEJIANG UNIV
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